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authorAlan Stern <stern@rowland.harvard.edu>2007-05-04 11:52:40 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-12 16:29:47 -0700
commit383975d765523a56dc43a6cd6d52e9b376800cf2 (patch)
treed6ecbfe620d7d5fba372211d7af185e7c44e5097 /drivers/usb/host/ehci.h
parent0458d5b4c9cc4ca0f62625d0144ddc4b4bc97a3c (diff)
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USB: EHCI, OHCI: handover changes
This patch (as887) changes the way ehci-hcd and ohci-hcd handle a loss of VBUS power during suspend. In order for the USB-persist facility to work correctly, it is necessary for low- and full-speed devices attached to a high-speed port to be handed back to the companion controller during resume processing. This entails three changes: adding code to ehci-hcd to perform the handover, removing code from ohci-hcd to turn off ports during root-hub reinit, and adding code to ohci-hcd to turn on ports during PCI controller resume. (Other bus glue resume methods for platforms supporting high-speed controllers would need a similar change, if any existed.) Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci.h')
-rw-r--r--drivers/usb/host/ehci.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 6ef9d775775..4d617108f55 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -96,11 +96,14 @@ struct ehci_hcd { /* one per controller */
/* per root hub port */
unsigned long reset_done [EHCI_MAX_ROOT_PORTS];
+
/* bit vectors (one bit per port) */
unsigned long bus_suspended; /* which ports were
already suspended at the start of a bus suspend */
unsigned long companion_ports; /* which ports are
dedicated to the companion controller */
+ unsigned long owned_ports; /* which ports are
+ owned by the companion during a bus suspend */
/* per-HC memory pools (could be per-bus, but ...) */
struct dma_pool *qh_pool; /* qh per active urb */